Furnace arch



RAMZZQ? July 17, 1923- R. D. DE WOLF FURNACE ARCH Originai Filed Aug.18, 1920 2 Sheets-Sheet l Patented duly E7, 1923.

auras 'srn'rss" aaeaaer QF FE ROGEB D. DE WOLF, OF ROCHESTER, NEW YORK.

FURNACE ARCH. I

Application, filed August 18, 1920, Serial No. 404,425." Renewedmne47,1928.

To all whom it may concern:

Be it known that I, Roenu 1). DE WOLF, a citizen of the United States,residin at Rochester, in the county of Monroe, tate of New York, haveinvented certain new and useful Improvements in Furnace Arches; and I dohereby declare the following to be a full, clear, and exact descriptionmorals marked thereon.

of the same, reference being had to the accompanying drawings, forming apart of this specification, and to the reference nu- This invention hasto do with furnaces, and more particularly with furnace arch structure,the chief object "of the invention To these and other ends the inventionconsists in certain improvements and combinations of parts, all as willbe. hereinafter more fully described, the novel features being pointedout in the claims at the end of the specification.

- In the drawings:

' Figure 1 is a longitudinal sectional view of a portionlof a. furnacehaving the present invention applied thereto and shown in elevation. A

Figure 2 is a partial end elevation of the front end of the arch.

of the arch. I Figure 4 is a'bottom plan new of the arch.

Figure 5 'is a perspective view of one of the hanger bricks of the arch.

the lining or facing bricks.

Figure 7 is a similar view of one of the end facing bricks.

Figure 8 is a similar view of a partition Figure 6 is a similar viewshowing one of ciples involved and a preferred. mode 0 applicationthereof, is shown asadapted for use in an ordinary type of furnace forsup-- plying heat to a water tube'boiler indicated generally at 15,Figure 1, the front wall of thefurnace being indicated at 16 with anopening 17 for the fire door. In the preferred construction of thearch'there are employed two or more laterally extending supportingelements, or I bars, 18, supported at their ends in the side walls 19 ofthe furnace, Figure 2. Carried by bars. 18 are yokes', preferably in theforin- 6f U-shap'ed rods 20, supporting a pluralit of ion tudinallyextending spaced par a llel I'ba r s 21, the lower flanges of each ofwhich are engaged by adjustable suspension members comprising .pairs ofangular metal plates 22. The plates of each pair engage on oppositesides of the bar and are preferably clamped thereto by means of a bolt23. The lower ends of plates 22 of each pair are turned inwardly towardseach other and adapted'to engage under ledges 24: adjacent the tops ofopposite sides of hanger bricks or tiles 25.

HA plurality of the latter are thus supported on each bar and arrangedin end to end abuttingjrelation from front to rear of the arch, as shownin the drawings, each of the bricks being preferably supported by twopairs of the suspension members, and it is apparent from theconstruction described Figure 3 is a similar view of the rear end, thatthe latter may be separated after re- The hanger bricks are preferablyformed with projecting ledges 26 adjacent their central portions on eachside for a purpose which will presently appear. Adjacent the bottoms ofthe bricks are also formed on each side inwardly and downwardly inclinedprojecting ledges 27. Engaging with each ledge 27 is a correspondingledge 28 on a facing or lining brick 29 whichis thus 86- .curelysupported on the hanger brick bv reason of the inclination of theledges, and the lining brick-conforms generally to the shape of thelower portion of one side of the hanger brick. Each of the latter thusdetachably supports two lining bricks, one on each side, whi h a joineach o h b low tions 30, thus completely lining or facing the arch andthoroughly protecting the hanger bricks from the action of the furnacegases. The sides 30 as well as the opposite plane shaped sides 31 of thelining bricks are not perpendicular to the end faces but inclinedthereto to cross the direction of flow of the heated gases in thefurnace and also to break joints with one another, as indicated at 32 inFigure 4; As is wellknown in the art the heated gases have a tendency toburn away or groove the surfaces of the bricks at joints therebetweenrunning longitudinally of the furnace, or in the direction of flow ofthe gases, and the inclination of the joints between the lining bricksdescribed, by crossing the direction of flow of the gases, tends toovercome their erosive action, andthe breaking-of joints of con providesalso for'breaking up the continuity of the joining surfaces to the sameend. The tops and bottoms. of the lining bricks form plane surfaces, asshown in the drawings.

The front and sidewalls of the furnace are preferably cut away adjacentthe lining bricks as at 33 to permit the latter to be slightly inserted.therein, the joint being packed with asbestos or other suitablematerial 34 to make a tight joint.

Detachably carried on the ledges 26 of the hanger bricks are flatsubstantially rectangular partition bricks or tiles 35, Figure 2, whichare thus spaced from the upper surfaces of the lining bricks so as toleave an insulating chamber 36 between each adjacent row or series ofhanger bricks. This chamber may be packed with asbestos or othersuitable insulating material, but is preferably left unobstructed andemployed as an air passageway for supplying auxiliary air 'underpressure to improve the combustion in the furnace, as will be furtherexplained hereafter. v

To finish and protect the inner end of the arch there are provided endfacing or lining bricks or tiles 37, Figures 1 and 7, having for aportion of their length, projecting ledges 38 similar to the ledges 28of the lining bricks, adapted to detachably engage over the ledges 27 ofthe hanger bricks, so

as to be firmly supported by the latter. The

ledge 38 of each .end brick preferably ends or'terminates as at .39 sothat the brick has a solid rear end .40 of substantial thickness whichoverlaps and projects beyond the rear end of the hanger brick to faceand protect the latter, and also to join up witha protective wall 48extending upwardly to the boiler and protecting the supporting elementsand other metal parts from the heat.

As'the end bricks overlap a portion only of the side of the rear hanger.bricks, shortlining bricks 29 are provided toeomplete the meager To thesame end there are placed on the projecting ends 40 of the end bricks aplurality of bricks 42, Figures 1, 9 and 10, closing the rear ends ofthe chambers or air passageways 36 and having formed therein grooves 43communicating with the air passageways and passing downwardly throughthe rear ends of the bricks as at 44. The openings 44 are preferablytapered inwardly toward their rear ends to form nozzles for rojectingthe air in a downward direction into the furnace as in the case ofgrooves 41. In furnaces of this type forced draft is frequently used andsuitable connections may be made between such source of air supply underpressure and the forward ends of chambers 36 for supplying air to thelatter to cool and insulate the arch and also to supply air to thefurnace to aid combustion 1n the manner described. Such air underpressure in passageways 36 also tends to cause a slight leakage of airgenerally terminal partition bricks 45 take the place of final bricks 35and the T-shaped ends 47 of bricks 45 cover the end portions 39 of theend facing bricks 37. On the ends 47 of the bricks 45 is built a wall 48for confining the gases and protecting the supporting elements and othermetal parts from the heat. It is to be understood that the bricks ortiles of wall 48 are laid as stringers and headers as shown and theweight thereof is carried by the partition bricks 45 so as to leave theend facing bricks 37 free for removal and replacement if desired.

In Figure 12 is shown a modified form of suspension member forsupporting the hanger bricks on the bars 21, comprising angular crossedmembers 49, secured'to each other in any suitable manner as at 50, thusforming a tong-like arrangement securely holding the bricks to the bars.This form of construction of the suspension members may beemployed-where there is considerable head room bars.

between the bricks and the m struction, the hanger bricks or tiles arereadily detachable from the supporting bars by loosening the suspensionmembers and the shape of the hanger bricks and of the facing or liningbricks carried thereby is such-that any one hanger brick with its facingor lining bricks may be readily detached and lowered independently ofother hanger bricks and their associated facing bricks for replacingsuch bricks as may become broken or burned, thus providing foreconomical repair of the arch with a minimum of labor.

. lining brick prevents the grooving or erosive action of the heatedgases on the joints, while the provision for supplying air interiorly ofthe fire brick and to the furnace serves to cool the arch, aidcombustion, and prevent the leakage of hot furnace gases through thejoints.

I claim is my invention:

1. A furnace arch comprising of supporting elements, a plurality ofhanger bricks supported by each of said elements independently of theother elements by means providing for the lowering and replacement ofthe bricks through the combustion chamber, and lining bricks carried bysaid hanger bricks to protect the latter and form a complete lining forsaid arch.

2.-A furnace arch comprising a plurality of supporting elements, aplurality" of hanger bricks detachably supported by said elements andeach adapted and arranged for individual detachment therefromindependently of the other hanger bricks, and lining bricks carried bysaid hanger bricks to protect the latter and form a complete lining forsaid arch.

3. A furnace arch comprising a pluralityof supporting elements, aplurality of hanger bricks detachably supported by said elements andeach adapted and arranged for individual detachment therefromindependently of the other hanger bricks,'and a lining brick carried byeach of said hanger bricks and detachable therewith.

4. A furnace arch comprising a plurality of supporting elements, aplurality of hanger bricks detachably supported by said elements andeach adapted and arranged for individual detachment therefromindependently of the other hanger bricks, and a plurality of liningbricks carried by each of said hanger bricks and detachable therewithindependently of the other lining bricks.

a plurality 5. A furnace arch comprising a plurality of supportingelements, a plurality of hanger bricks detachably supported by each ofsaid elements and each adapted and arranged for individual detachmenttherefrom independently of theother hanger bricks, and a lining brickcarried by each of said hanger bricks and detachable therewith.

6. A furnace arch comprising a plurality of supporting elements,adjustable suspension members on said elements, a plurality of hangerbricks each detachably supported by said members for individualdetachment independently of the other hanger bricks, and a lining brickcarried by each hanger brick and detachable therewith.

7. A furnace arch comprising-a plurality of supporting elements,adjustable suspension members on each of said elements, hanger brickssupported by the members of each of said element-s independently of theother elements and each adapted and arranged for individual detachmentindependently of the other hanger bricks, and a lining brick carried byeach hanger brick and removable therewith.

8. A furnace arch comprising a plurality of supporting elements, aplurality of hanger bricks, an adjustable clamping member for detachablysuspending each of said hanger bricks from one of said elements, saidparts being adapted for the detachment of each hanger brickindependently of the other hanger bricks, and a plurality of bricks forcompletely lining the under surface of the arch each carried by one ofsaiojl hanger bricks and detachable there- Wit 9. A furnace archcomprising a plurality of supporting elements, a plurality of hangerbricks detachably supported by said elements and each adapted andarranged for individual detachment therefrom independently of the otherhanger bricks, and a plurality of bricks for lining the under surface ofthe arch arranged to break joints with each other and each carried byone of said hanger bricks and detachable therewith.

10. A furnace -arch comprising a plurality of supporting elements,adjustable suspension members on said elements, a plurality of hangerbricks each detachably supported by said members for individualdetachmentindependently of the other hanger bricks, and a plurality ofbricks for lining the under surface of the arch having their sidesinclined to cross the direction of flow of the heated gases and to breakjoints with elements and each adapted and arranged for individualdetachment therefrom inclependently of the other hanger bricks, and apair of lining bricks detachably carried on opposite sides of eachhanger brick for protecting the latter from the furnace gases and fordetachment therewith independently of the adjacent lining bricks.

12. A furnace arch comprising a plurality of supporting elements, aplurality of hanger bricks detachably supported by said elements, and aplurality of bricks for lining the under surface of the arch havingtheir sides inclined to cross the direction of flow of the heated gasesand to break joints with one another and each detachably carried by oneof said hanger bricks and detachable therewith.

13. A furnace arch comprising a plurality of supporting elements, aplurality of hanger bricks detachably supported by said elements, liningbricks detachably carried by a said hanger bricks adjacent their bottomsand detachabletherewith, and a plurality of bricks carried by saidhanger bricks above said lining bricks in spaced relation with thelatter to form an insulating chamber.

14. A furnace arch comprising a plurality of supporting elements, aplurality of hanger bricks detachably supported by said elements andeach adapted and arranged for individual detachment therefromindependently of the other hanger bricks, lining bricks detachablycarried by said hanger bricks adjacent their bottoms and detachabletherewith, and a plurality of bricks detachably carried by said hangerbricks above said lining bricks in spaced relation with the latter toform an insulating chamber.

15. A furnace arch comprising a plurality of supporting elements, aplurality of hanger bricks supported by said elements and individuallydetachable therefrom, lining bricks carried by said hanger bricks anddetachable therewith, and end bricks detachably carried by the hangerbricks at the end of the arch and projecting beyond the latter tosupport a protective end wall.

16. A furnace arch comprising a plurality of supporting elements, aplurality of banger bricks supported by said elements and individuallydetachable therefrom, lining bricks carried by said hanger bricks anddetachable therewith, a plurality of end bricks detachably supported andarranged to project beyond the inner end of the arch,'a protective endWall supported on said end bricks, and a plurality of bricksdetachablycarried by said hanger bricks above said lining bricks inspaced relation therewith and joining said end wall to form aninsulating chamber.

17 A furnace arch comprising a plurality of supporting elements, aplurality of hanger bricks supported by said elements and individuallydetachable therefronulining bricks carried by said hanger bricks anddetachable therewith, a plurality of end bricks detachably supported andarranged to project beyond the inner end of the arch, a plurality ofbricks detachably carried by said hanger bricks above said lining bricksin spaced relation with the latter to form an insulating air chamber,and a protective end wall on the projecting portions of said end brickshaving bricks closing the end of said air chamber and formed withnozzles communicating therewith for projecting auxiliary air into thefurnace.

18. A furnace arch comprising a plurality of supporting elements, aplurality of hanger bricks supported by said elements and individuallydetachabletherefrom, lining bricks carried by said hanger bricks anddetachable therewith, a. plurality of end bricks detachably supportedand arranged to project beyond the inner end of the arch, a plurality ofbricks detachably carried by said hanger bricks above said lining bricksin spaced relation with the latter to form an insulating air chamber,and a protective end wall on the projecting portions of said end bricks,said end bricks and end wall having openings therein communicating withsaid air chamber for projecting auxiliary air into of supporting barsprovided with suspension members, hanger bricks supported by saidmembers for individual detachment.

lining bricks detachably carried by said hanger bricks and arranged tobreak joints with one another, a plurality of bricks detachably carriedby said hanger bricks above said lining bricks in spaced'relationtherewith to form an insulating chamber, end bricks supported on saidhangerbricks at the inner end of the arch, and a brick wall on said endbricks to close said chamber and protect said bars.

20. A furnace arch comprising support ing elements, hanger bricks,supporting means connecting said elements and hanger bricks constructedand arranged to provide for removal of said ban or bricks by lowerin thesame into the urnace, andlining bricks carried by said hanger bricks toprotect the latter and form a lining for the arch.

ROGER D. DE WOLF.

